Ironically, not all of the 29 couples who married in the courthouse Tuesday came because of the date.

Vivian Coleman and David Joshua of Toledo said they didn’t know of the date’s significance until they arrived at the courthouse where several people told them about it.

“It’s going to be a good day,” Ms. Coleman said before exchanging vows with Mr. Joshua. “I’ve been hearing that all day.”

Angela Reppenhagen of Fowlerville, Mich., was dressed in a sleeveless blue dress and sandals when she and Ryan Amell got married. Mr. Amell said they chose the date about three weeks ago, not realizing it would be such a popular wedding day — and not expecting it to be so cold either.

James Kimes and Evie Sowards of Lincoln Park, Mich., said they were contemplating a Halloween wedding but decided to wait until 11-12-13. They were sporting matching white T-shirts — his with the word “groom” written in blood-dripping letters and hers with a similar “bride” across the front.